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Invertase activity in Streptococcus mutans and Streptococcus sanguis
Authors:M M McCabe  E E Smith  R A Cowman
Affiliation:Department of Biochemistry, University of Miami School of Medicine, Miami, Florida 33152, U.S.A.;Dental Research Unit, Veterans Administration Hospital, and Institute of Oral Biology, University of Miami, Miami, Florida 33152, U.S.A.
Abstract:
Toluene treatment of intact cells revealed invertase-like activity in Streptococcus mutans K1-R (cariogenic) and in Streptococcus sanguis 903–1600 (noncariogenic). The activity was identified as a β-d-fructofuranoside fructohydrolase (invertase; EC. 3.2.1.26) by its hydrolysis of sucrose and raffinose and its failure to act on melezitose and other glucoside derivatives. The invertase was induced by sucrose in Strep, sanguis but was a constituent in Strep. mutans. Amylomaltase, a transferase acting on maltosaccharide, was also detected in both organisms.
Keywords:
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